Working-beam



2 Sheets-Sheet 1..

(No Model.)

0. E. EMERY W RKIN BEAM.

No 398,955. Patented Mar. 5. 1889..

2 Sheets-Sheet 2.

m R BE MG m K ER 0 W a d 0 M 0 W No. 398,955. Patented Mar. 5, 1889.

S E m m elimcgrayhen wm-u wn. n. c.

ilnrrnn Starts CHARLES la. ElliERY, OF

PAT NT. @rricn.

vZROOKLYY, NEXV YORK.

WORKING-BEAM.

SiECIFIGATION forming part of Letters Patent No. 398,955, dated March 5,1889.

Application filed June 6, 1888.

To (1U whom it may concern.

30 it known that 1, CHARLES E. EMERY, a

citizen of the United States, residing in the city of Brooklyn, countyof Kings, and State of New York, (office New York city,) have inventedcertain new and useful Improvements in the \Vorking-Beams ofSteam-llngines; and I do hereby declare that the following is a full,clear, and exact description of the same, reference bcin had to the acen1pan ving drawings, making part of this speciiicatien, in which- Figurel. is a vertical elevation of the working-beam as improved, and Fig. 2 aplan view of the strap of the beam for the greater portion of itslength. Fig. 2} is a vertical elevation of the greater part of thelength of a modified form 01' the improved. wo'rki ng-beam, and Fig. lis a plan view of the st ap of the same for the greater portion of itslength.

A is the web of the beam, provideiil with long arms A A and short arms A1 13 is the beam-strap, composed of a numborol? layers or sections, I)Z) Z). (l and indicate plate-clamps; C strz'zp-clamps; (i intermediateplate-clz'unps, and l.)olt-clamps. Dis the main center. E ii areopenings for the main connecting-pins. F l" are openings for pins toconnect to pumps, &c. G G, &c., are

keys for tightening the compound strap over the web. The elevation, Fig.1, shows the generaliorm ol? the beam of the typical Americanbeamengine. The beam is constructed wit-h acast-iron web, A, in thegeneral form. of a cross with horizontal arms A A, longer than thevertical ones, A A which web is surrounded by a heavy lozenge-shapedstrap of wrought-iron, into which the web is keyed. At the longer anglesof the lozei'ige pin-holes are provided for the main connections, whichare formed in the strap in Figs. 1 and 2, and in the web in Figs. and-l. The web of the beam is provided with openings for the main centerpin and for connections to pumps, the.

A beam-strap is ordinarily made in one large forging, built up, as itcalled, by welding together many pieces. A forging of this kind isdeficient in strength, homogeneity, and extensibility as con'ipared withsmaller bars of rolled iron. Such beam-straps have Serial No. 276,276.(No model.)

i broken in. many cases, causing the wreck of the principal parts of theengine and much of the surrounding wood-work, also, not untreqnently,loss of life.

In my improved beam the beam-strap is divided longitudinally into anumber of parts, each resembling in elevation the shape of beam-strapsof former construction; but the total thickness of the strap being madeup of a number of comparatively thin sections each canbe better and moreuniformlyworked in the operation. of forging, and can be made muchstronger per unit of section and more reliable, for reasons well knownby those skilled in the art. The several parts are laid closelytogether, fitted as a unit over the arms of the web A, and secured tothe same by keys G G in substantially the same way as when the strap ismade of one piece. Thus connected the several parts will act together intension as a unit, the same as it theyhad been forged together; but incompression their full strength cannot be utilized unless they areprevented from buckling. This is accomplished by clamping them togetherby means of clamps oi" diil'erent forms adapted to the portion of thecom pound strap operated upon. At the ends it is proposed to useplateclamps (J C, secured together by bolts passing through the joint(enlarged as necessary) between the web and the compound strap. thehalf-length of the beam-strap clamps C C are employed. At thequarter-points arms on the web are fitted against the compound strap,and plate-clamps C, with holes for two or more bolts and for a key, areclamped by the bolts to the compound strap at the same time that thekeys are driven, to draw the strap tightly against the arms on the weband prevent shake. To accomplish this the inner bolts adjoining the keysare made loose in the holes in web, so that the key draws the outerbolts tightly against the strap.

At points where the strap is clear of the web plain clamps C G areemployed, consisting of two plates on opposite sides of the compoundbeam-strap, held tightly together by bolts. U-bolts may also be usedwith one plate to accomplish the same purpose. The strap at such pointsmay or may not be swelled out to receive the bolt-holes. Bolts formingbolt-clamps C C" may be put through the compound beanrstrap to clamp-theparts together, if desired, the metal bars being swelled opposite theholes to keep up the strength; or rivets may be used in a similarmanner. hen the end pins are put in the ends of the web, as in Figs. 3and 4, the compound strap must be secured over it with keys Well fittedlaterally in key-seats in the strap and Web, the laminae of the latterbeing widened opposite the same to keep up the strength. The short armsof the Web may be similarly secured, or saddles K K interposed, withwedges G G between them and the ends of the arms, as shown, or the sameconstruction may be adopted as is shown in Fig.1. In the general waydescribed a beam may be constructed of much greater strength than ispossible when the strap is made of a single piece. Moreover, a defect inone portion Will rarely cause breakage of the Whole, and if the factorofsafety be made sufficiently large one part may break and the otherscontinueto do the Work until the difficulty is discovered and remedied.

v WVhat I claim as my invention, and desire to secure by Letters Patent,is

1. In combination with the web of a Working-beam, a beam-strap composedof a nun1- ber of thicknesses connected and operating together,substantially as and for the purposes specified.

2. In a working-beam, a strap composed of a number of laminae clampedtogether to act as a unit, substantially as described.

The combination, with the Web of a Working-beam and a compoundbeam-strap formed of a number of thicknesses, of clamps forinsuring thestability of the strap under compres, ive strains.

CHAS. E. EMERY.

Witnesses:

ROBT. M. REEvs, GEORGE O. PENNELL.

